8 Best Interior Design Courses & Certificate Programs Online in 2026

Last updated: October 2026. Written by Josh Hutcheson. See our review methodology.

Interior design is two different goals wearing the same name. One is learning the craft (color, space planning, lighting, styling a room) for your own home, a decorating or e-design business, or a creative hobby. The other is becoming a credentialed professional who works on commercial and code-regulated projects. Online courses are excellent for the first and only a starting point for the second. We re-checked every option below on its live page on 17 October 2026, read five recent threads from designers in r/interiordesigner and r/InteriorDesign, and explain plainly where a course ends and a professional credential begins.

See our top pick on MasterClass →

The best interior design courses at a glance

We earn commission on MasterClass, Coursera, Udemy and Domestika. The schools and credentials (picks 3, 4 and 5, plus NYSID, UCLA Extension and the NCIDQ) are listed because they are the honest answer for their intent, not because they pay us; we have no affiliate relationship with them.

1. Kelly Wearstler Teaches Interior Design (MasterClass) — best for the design eye

Kelly Wearstler is one of the most influential interior designers working today, and her MasterClass (17 lessons, 2 hours 13 minutes on 17 October 2026) is the best thing we have found for developing an actual design sensibility rather than following rules. She walks through how she approaches color, proportion, materials and mixing styles with confidence, using her own residential and hospitality projects as examples. It will not teach you drafting software or how to run a business, but for learning to see like a designer, the part that is hardest to teach yourself, it is excellent and beautifully produced.

It runs on a MasterClass membership, billed annually only: $120 a year for Standard, $180 for Plus and $240 for Premium, each including all 200+ classes, with a 30-day satisfaction guarantee on first purchases. The membership renews automatically each year, so note the date. Our MasterClass pricing guide explains the tiers. It is the best value if you will also watch other design and creative classes.

Best for: hobbyists and aspiring designers who want to build taste.  Skip if: you need software training or graded work.

Watch Kelly Wearstler on MasterClass →

2. Blueprint to Brilliance Through Interior Design (Coursera) — best structured course

Where MasterClass is inspiration, this Coursera course is a guided process. Blueprint to Brilliance Through Interior Design takes you through a project in the order a designer works: the site visit and client consultation, measurements and proportions in a room layout, choosing materials, lighting, colors and textures, and preparing the final design for execution. On 17 October 2026 it was rated 4.4 from 174 reviews with 21,414 learners enrolled. Coursera itself offers it (it is not a university course), and Anna Delgove Alday teaches it.

Be clear about its size: it is a single module of about an hour. That makes it a quick, low-risk way to see how a real project flows before you spend on a diploma, not a full education. One reviewer summed it up as basic but packed with information. It is included with Coursera Plus ($59 a month with a 7-day free trial, or $399 a year).

Best for: beginners who want a structured first look at the design process.  Skip if: you want a course that builds a portfolio; see picks 3 and 4.

View the course on Coursera →

3. Online diplomas: The Interior Design Institute & NYIAD

If you want a substantial program that ends in a diploma or certificate and a real portfolio, two schools dominate the online space. Both are self-paced, project-based and tutor-supported, and both are aimed at people who want to start a decorating, styling or e-design business.

3. The Interior Design Institute (IDI): Diploma of Interior Design

The Interior Design Institute’s diploma covers 12 modules over 12 months of self-paced study, with tutor feedback on your assignments and a portfolio by the end; extra time can be bought in 6-month extensions. On 17 October 2026 the Diploma was $1,299 (or 24 weekly payments of $54.13), with $100 off for paying in full, and a Diploma Plus at $1,699 added a video masterseries from designer Darren Palmer. Optional advanced modules cover business and marketing for designers, kitchens and bathrooms, SketchUp and AutoCAD. Designers in a 2025 r/InteriorDesign thread named it among the online schools they would consider.

4. NYIAD (New York Institute of Art and Design): Interior Design course

NYIAD’s course is organized in six units with more than 13 hours of HD video from professional interior designers, a series of design projects and mentor feedback, and an interior design certificate on graduation. Its tuition page on 17 October 2026 listed $1,299, or $999 paid in full, with a monthly plan from $69 a month after a $59 first payment, and 25% off a second course taken at the same time.

One honesty note on both: a diploma or certificate from these schools is a credible portfolio credential, and for decorating, styling and e-design work it is plenty. It is not a CIDA-accredited degree, and it does not make you eligible for the NCIDQ or professional licensure.

The truth about “interior design certification”

This is the part most “best interior design certification” articles skip. The professional credential for interior designers in the United States and Canada is the NCIDQ Certification from the Council for Interior Design Qualification (CIDQ). It is not a course you buy. It is a set of three exams (the IDFX fundamentals exam, the IDPX professional exam and the IDIX practicum), and to sit them you need a combination of interior design education and documented work experience, verified by a supervisor. CIDQ’s eligibility rules count education by interior design credit hours (60 at minimum for the routes that rely on coursework), and the strongest route starts with a CIDA-accredited degree. Students can take the IDFX before finishing their work experience.

States differ on what you need to practice. Some regulate the title “interior designer” or work on commercial projects, while residential decorating is open to anyone in most places. A designer in an October 2026 r/interiordesigner thread from Arizona noted that no degree was required for the residential work they wanted, while another who works in commercial design said they needed a degree and the NCIDQ. Check your own state before you choose a path.

5. Certified Residential Interior Designer (ed2go): a credential for residential work

If you want a credential for residential work without a degree, ed2go’s Certified Residential Interior Designer course is the most structured option we found. On 17 October 2026 it cost $2,830 (with monthly financing through Affirm), ran 9 months and 160 course hours with open enrollment, and ended with the R.I.D.E. (Residential Interior Design Education) credential plus a voucher for the RIDQC certification exam from the Designer Society of America. ed2go states plainly that it does not meet the education requirements for state licensure or prepare you for a state licensing exam.

For a college route, New York School of Interior Design (NYSID) offers a Basic Interior Design certificate that can be completed fully online with no portfolio required, and its credits apply to NYSID’s degree programs if you continue. A NYSID bachelor’s student on Reddit praised the online program’s rigor and faculty. Designers in the same threads also recommended the UCLA Extension and UC Berkeley Extension certificate programs, and Parsons; a Parsons certificate holder said it helped, but that they later needed a bachelor’s degree and the NCIDQ for commercial work.

Learning the software

Professional interior design runs on software, and this is where a course platform like Udemy genuinely shines: not for a full design education, but for tool skills. Designers on Reddit were blunt that firms expect drafting and rendering ability; one advised spending a year learning CAD rather than taking a short design course.

6. The Complete SketchUp & V-Ray Course for Interior Design (Udemy)

SketchUp is the most common 3D tool for residential interiors, and V-Ray turns models into photo-realistic renders. This course covers modeling, rendering and post-production in Photoshop for interior scenes: 4.5 from 5,998 ratings, 42,600 students, about 7 hours, last updated September 2025 when we checked on 17 October 2026.

View the SketchUp and V-Ray course →

For 2D floor plans and construction drawings, AutoCAD is the standard; see our guide to the best AutoCAD online courses for courses and free student licenses. Revit appears in commercial firms’ job ads more than in residential ones. Look at job listings in your area to see which programs employers ask for, as one designer on Reddit suggested.

Key skills these courses build

• Space planning: arranging a room so it works and flows, with correct clearances and measurements.
• Color and materials: building palettes and combining textures and finishes.
• Lighting: layering ambient, task and accent light, the detail amateurs most often miss.
• Styling and composition: the finishing layer that makes a room feel designed.
• Drawings and presentation: mood boards, floor plans and renders to communicate a scheme to a client.
• Client and project process: the consultation, brief, budget and schedule that turn a design into a finished room.

Career paths

The skills lead to several routes that do not all require licensure: interior decorator (styling and furnishing), e-design or online room design (a remote service delivered through mood boards and shopping lists), home staging for real estate, and design assistant at a firm. With a degree and the NCIDQ, they lead to professional interior designer on commercial and regulated projects. The course and diploma routes on this page suit the first four; only the last requires the formal credential.

How to choose

• Just exploring? Pair Kelly Wearstler’s MasterClass with the short Coursera course or one of Erikka Fogleman’s Udemy courses (pick 7).
• Starting a decorating or e-design business? A diploma from The Interior Design Institute or NYIAD gives you a portfolio, feedback and structure.
• Want a residential credential without a degree? Look at ed2go’s Certified Residential Interior Designer (pick 5), and read what it does and does not qualify you for.
• Want to practice professionally? Plan for a CIDA-accredited degree and the NCIDQ. A college certificate such as NYSID’s can be the first step, since its credits count toward a degree.
• Already designing and need drawings? Add a SketchUp or AutoCAD course (pick 6).

Free and low-cost ways to start

You do not need to spend much to find out whether interior design is for you. These are the low-cost courses we would start with, followed by free options.

7. Erikka Fogleman’s interior design courses (Udemy)

Erikka Fogleman’s two most popular Udemy courses are the best-rated low-cost introductions we found. How to Design a Room in 10 Easy Steps (4.5 from 8,816 ratings, 40,431 students, 2 hours, updated October 2025) gives you a repeatable method for any room, from measuring and the floor plan to lighting and accessories. How to Work with Interior Design Styles Like a Pro (4.6 from 11,552 ratings, 60,832 students, 5.5 hours, updated July 2025) explains the major styles and how to mix them. Both showed $14.99 on 17 October 2026, and Udemy offers a 30-day refund window on most purchases.

View How to Design a Room in 10 Easy Steps →

8. Domestika interior design courses

Domestika’s most-taken interior course is Interior Design from Start to Finish by Ana García López (1 hour 42 minutes, 125,237 students, 95% positive reviews on 17 October 2026), which follows one project from brief to finished room. For more depth, the Interior Design Specialization: Materials, Lighting, and Color runs 10 hours across 79 lessons from five teachers (7,985 students, 100% positive). Courses listed at $30.99 and specializations at $95.99, with a 98% discount showing at checkout that day; each course ends in a project you can share with other students.

Free options

• Coursera: Blueprint to Brilliance (pick 2) is included in Coursera Plus’s 7-day free trial, and financial aid is available on many Coursera courses.
• YouTube: working designers post useful walkthroughs on space planning, color and styling. It is unstructured but free.
• Your library: classic interior design textbooks and magazines are free to borrow, and many libraries also give free access to LinkedIn Learning’s design courses.
• Software trials: SketchUp and AutoCAD both offer free trials, and Autodesk gives eligible students free educational licenses.

Start free or cheap, and only pay for a diploma once you are sure you want to take it further. The expensive programs are worth it for a portfolio, feedback and structure, not for testing the water.

Are interior design courses worth it?

For learning the craft and starting a decorating or e-design business, yes. A good course or diploma compresses years of trial and error into a structured path, and the inspiration-plus-method combination we recommend costs very little to begin. The place to be careful is expectations. Designers on Reddit were candid that a one-year course is realistic for decoration but not for becoming a full interior designer, and that firms care about drafting skills and portfolios. If your goal is to practice as a licensed professional, a course is the first step, not the destination, and the real investment is the degree, the experience and the NCIDQ. Match the spend to the goal and these courses are well worth it; buy a $1,300 diploma expecting it to license you and you will be disappointed.

Frequently asked questions

What is the best online interior design course?

For building a design eye, Kelly Wearstler’s MasterClass. For a low-cost method, Erikka Fogleman’s How to Design a Room in 10 Easy Steps on Udemy (4.5 from 8,816 ratings on 17 October 2026). For a diploma and portfolio, The Interior Design Institute or NYIAD.

Can I become a certified interior designer with an online course?

Not in the professional sense. The recognized credential is the NCIDQ, which requires interior design education (ideally a CIDA-accredited degree) and verified work experience before you can sit all three exams. Online courses and diplomas teach the skills and support a decorating or e-design business, and ed2go’s course leads to a residential credential, but none of them grant NCIDQ eligibility on their own.

How much do interior design courses cost?

On 17 October 2026: Udemy courses showed $14.99, MasterClass was $120 to $240 a year, Domestika courses listed at $30.99, The Interior Design Institute’s diploma was $1,299 ($1,199 paid in full), NYIAD was $1,299 ($999 paid in full) and ed2go’s Certified Residential Interior Designer was $2,830.

Are there free interior design courses with a certificate?

Most certificates cost money. You can take Coursera’s Blueprint to Brilliance during Coursera Plus’s 7-day free trial and earn its certificate if you finish in time, and Coursera offers financial aid on many courses. YouTube and library resources are free but carry no certificate.

How long does it take to get an interior design certificate online?

It ranges from about an hour for a short Coursera course to 9 months for ed2go’s credential course and up to 12 months for The Interior Design Institute’s diploma. A professional route through a degree, work experience and the NCIDQ takes several years.

Are there CIDA-accredited interior design programs online?

Some colleges deliver CIDA-accredited degrees partly or fully online; check the program list on cida.org and confirm the delivery format with each school. NYSID, for example, offers its degree programs largely online and its Basic Interior Design certificate credits apply toward them.

What is the difference between an interior decorator and an interior designer?

Decorators focus on furnishings, color and styling and do not need a license; the courses and diplomas here are aimed at this path. Interior designers work on the built environment, including code-regulated commercial projects, and typically need a degree, experience and the NCIDQ, depending on state rules.

Is Udemy, Coursera or edX better for interior design courses?

Udemy has the widest choice of practical interior design and software courses at low one-time prices. Coursera’s interior design course is short but included in Coursera Plus. edX had 12 results for interior design on 17 October 2026, including short courses such as Interior Design Essentials and Applied Interior Design, so it is a smaller catalog to compare against the other two.

Related: interior designers often draft floor plans in AutoCAD. See our guide to the best AutoCAD online courses for courses, certification and free student licenses.

Related guides

• Best MasterClass courses
• MasterClass pricing: every plan explained
• Best AutoCAD online courses
• Best product design courses
• Best online photography courses (for portfolio photos of your rooms)

Start with our top pick →